Stroke: Symptoms, Causes & Risk Factors

Every minute matters when a stroke strikes. A stroke happens when blood flow to the brain gets cut off, either by a blockage or bleeding. Brain cells begin dying within minutes, making this a medical emergency. This article covers the key stroke symptoms, causes, and risk factors so you can act fast when it counts.

What Is a Stroke and What Are Its Types?

Your brain needs a constant supply of blood to function. A stroke interrupts that supply, starving brain cells of oxygen. Without quick treatment, this can lead to lasting damage or death.

There are three main types to know:

• Ischaemic stroke: A blood clot blocks a vessel in the brain. Around 80% of all strokes fall into this category.
• Haemorrhagic stroke: A blood vessel in the brain ruptures. This causes bleeding that damages surrounding tissue.
• Transient Ischaemic Attack (TIA): Often called a mini-stroke, this involves a brief blockage. Symptoms are temporary but serve as a serious warning sign.

How Can You Recognise Stroke Symptoms Early?

Spotting stroke symptoms quickly can save a life. The BE FAST framework helps identify up to 95% of acute strokes, including those in the back of the brain.

Here is what each letter stands for:

• B — Balance: Sudden loss of balance or coordination.
• E — Eyes: Blurred or double vision in one or both eyes.
• F — Face: One side of the face droops. Ask the person to smile.
• A — Arms: Weakness or numbness in one arm. Ask them to raise both arms.
• S — Speech: Slurred or garbled speech. Ask them to repeat a simple phrase.
• T — Time: Call emergency services (112 in India) immediately.

If you notice even one of these signs, treat it as an emergency. Do not wait to see if symptoms pass.

Other Warning Signs You Should Not Ignore

Some stroke symptoms appear outside the BE FAST framework. Watch for these additional signs:

• A sudden, severe headache with no obvious cause.
• Unexpected confusion or difficulty understanding others.
• Numbness or weakness on one side of the body.
• Trouble walking or sudden dizziness.

These signs can appear alone or alongside BE FAST symptoms. Either way, seek medical help without delay.

Also Read: Blood Clotting Disorders: Types, Symptoms & Treatment

What Are the Main Stroke Causes?

Understanding stroke causes helps make sense of why strokes happen. The mechanism differs by type.

Ischaemic strokes occur when fatty deposits (plaque) or blood clots block arteries supplying the brain. This cuts off oxygen to brain tissue downstream of the blockage.

Haemorrhagic strokes happen when a weakened blood vessel bursts. The resulting bleeding puts pressure on brain cells and damages them. Conditions like uncontrolled high blood pressure or aneurysms can weaken these vessels over time.

Globally, metabolic risks — such as high blood sugar and high cholesterol — contribute to roughly 69% of all strokes. Behavioural risks like smoking and physical inactivity account for about 35%.

What Are the Key Stroke Risk Factors?

Some stroke risk factors are within your control. Others are not. Knowing the difference helps you focus your efforts.

High blood pressure is the single largest contributor to stroke risk — and it is modifiable. After age 55, stroke risk roughly doubles every ten years. A family history of stroke also raises your chances.

Talk to your doctor about your personal risk profile, especially if you have two or more of these factors.

Also Read: Symptoms Of High Lipoprotein: Warning Signs & Heart Risks

When Should You See a Doctor?

Speed is everything. Patients who receive clot-dissolving treatment within 4.5 hours of the onset of their symptoms have a much better chance of recovering without lasting disability.

Here are practical steps to lower your risk:

• Get your blood pressure checked regularly. Uncontrolled hypertension is the top modifiable risk factor.
• Keep blood sugar and cholesterol levels within healthy ranges.
• Stay physically active — even a daily 30-minute walk helps.
• Limit salt, processed foods, and alcohol in your diet.
• Quit smoking. Your doctor can suggest support options suited to you.

Acting early — both during an emergency and in daily prevention — makes a measurable difference.

Take Quick Action, Start Today

A stroke is a race against time, and knowing how to spot the signs can protect you and your loved ones. Remember BE FAST, understand your personal risk factors, and take small daily steps to manage blood pressure, blood sugar, and cholesterol. These choices add up.

If you would like to better understand your risk, Lupin Diagnostics offers comprehensive health check-ups and blood tests at NABL-accredited labs across India. Book a check-up to get a clear picture of your health.

Frequently Asked Questions

Which tests are required to diagnose stroke?

A stroke is primarily diagnosed using emergency brain imaging like a CT Scan or MRI scan to detect blockages or bleeding. Doctors also perform blood tests—including a blood glucose test, coagulation profile (PT/INR) test, Complete Blood Count (CBC) test and lipid panel test—to check clotting ability, rule out low blood sugar, and identify underlying risk factors.

What is a mini-stroke vs a full stroke?

A TIA (mini-stroke) causes temporary symptoms lasting only minutes because the blockage clears on its own. A full stroke causes prolonged interruption of blood flow, leading to lasting brain injury.

Can a stroke happen while you are sleeping?

Yes. Wake-up strokes account for approximately 20% of ischaemic strokes. A person falls asleep feeling fine but wakes up with symptoms.

What does a stroke feel like when it starts?

Most people experience sudden numbness or weakness on one side. Confusion, vision trouble, dizziness, or a severe headache with no clear cause are also common.

How are strokes officially diagnosed by doctors?

A CT scan is the most common first step because it is fast and widely available. An MRI may follow for greater detail, especially for ischaemic strokes.

What is the most common age for a stroke?

Stroke risk rises sharply after 55 and roughly doubles each decade. About 75% of strokes occur in people aged 65 and older.

Can stress and anxiety cause a stroke?

Emerging evidence suggests anxiety disorders may raise stroke risk by around 24%. However, research is still evolving. Discuss mental health concerns with a qualified professional.

This article is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. If you have concerns about stroke or any health condition, please consult a qualified healthcare provider.